Total with GST
₹1,180
Base Amount
₹1,000
GST Amount
₹180
18% GST Calculator
For a ₹1,000 base price, 18% GST adds ₹180, making the inclusive price ₹1,180. For a ₹1,180 inclusive price, the base is ₹1,000 (divide by 1.18).
Original Amount
₹10,000
GST Amount (18%)
₹1,800
Total with GST
₹11,800
What is the GST Calculator?
GST (Goods and Services Tax) is India's unified indirect tax system introduced in 2017. It replaced VAT, service tax, and several other indirect taxes. GST is levied at 5 slabs — 0%, 5%, 12%, 18%, and 28% — with 28% applying to luxury goods. For intra-state transactions, GST is split 50:50 between CGST and SGST. For inter-state, IGST is charged.
Formula
Inclusive = Base × (1 + rate) | Base = Inclusive ÷ (1 + rate)- Base
- = Pre-tax price
- r
- = GST rate as decimal (e.g., 0.18 for 18%)
How to use the GST Calculator
- 1
Enter the amount
Either the base price (for adding GST) or the GST-inclusive price (for removing GST).
- 2
Select the GST rate
5%, 12%, 18%, or 28% depending on the product/service category.
- 3
Choose "Add" or "Remove"
Add GST to get the final price. Remove GST to find the base price from an inclusive amount.
- 4
Review the breakdown
The calculator shows base price, GST amount, total, and the CGST/SGST split (or IGST for inter-state).
Reviewed by
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Frequently asked questions
What are the GST slabs in India?
5 slabs: 0% (essential food items, books, most health), 5% (packaged food, footwear under ₹1000, transport), 12% (apparel above ₹1000, business class air), 18% (most services, electronics, restaurants with AC), 28% (luxury cars, tobacco, gambling). Some items have cess on top of 28% (tobacco, luxury cars).
What is the difference between CGST, SGST, and IGST?
CGST goes to the central government, SGST goes to the state government, and IGST is collected by the centre on inter-state transactions (later split between centre and destination state). If a Mumbai seller ships to a Delhi buyer, the transaction attracts IGST. If both are in Mumbai, it attracts CGST + SGST at half the total rate each.
Do I need GST registration in India?
GST registration is mandatory if your annual turnover exceeds ₹40 lakh for goods (₹20 lakh for services) in most states, or ₹20 lakh for goods (₹10 lakh for services) in special-category states. E-commerce sellers, inter-state suppliers, and casual taxable persons need registration regardless of turnover.
Can I claim input tax credit?
Yes, if you are a GST-registered business buying goods or services for business use, you can claim the GST you paid as Input Tax Credit (ITC) against your output GST liability. You need a valid tax invoice and the supplier must have filed their GSTR-1. ITC on personal expenses, motor vehicles for personal use, and food/beverages is generally blocked.
How is GST calculated on a product MRP?
MRP in India is inclusive of all taxes. To find the base price, divide MRP by (1 + GST rate). For a ₹100 product at 18% GST, the base is ₹100 ÷ 1.18 = ₹84.75, and the GST component is ₹15.25. Retailers cannot charge above MRP, but they can (and often do) sell below MRP.
Sources
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